Etymotic Musician Filters Filter NRR:ER-9 supreme flexibility and extreme simplicity

supreme flexibility and extreme simplicity of use make Piano the ideal choice for clinics and hospitals

The combination of the two produces a resonance at approximately 2700 Hz (as in the normal ear)

These ear-dams consist of flexible foam material in order to seal the auditory canal safely (12mm in length)

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Etymotic Musician Filters Filter NRR:ER-9 supreme flexibility and extreme simplicityThis product page is for the Etymotic Filters only. The Etymotic musician ear plugs with filters, or buttons, have a diaphragm which functions as an acoustic compliance, while the volume of air in the sound bore of the custom ear mold acts as an acoustic mass. The combination of the two produces a resonance at approximately 2700 Hz (as in the normal ear), which results in smooth, flat attenuation. Etymotic Filters & Reduction Levels ER 9 Provides flat